Most people– male or female, rich or poor, liberal or conservative, gay or straight– want to find a great person, fall in love, and get married. This is hard to do for a person (and especially for a heterosexual woman) who’s had too many sexual partners. It’s difficult internally because once a taste for variety is developed, this tends to be lifelong; it’s difficult externally because the most desirable marriage partners tend to be quality-oriented people who have never had casual sex and will consider a prospective partner’s unscrupulous past to be a dealbreaker.

Very few people expect to marry virgins these days– in the 21st century, we’ve come to accept the natural human pattern of serial monogamy when young followed by lifelong monogamy in maturation– but I can’t think of anyone who wants to marry someone who’s had a one-night stand. Just… ew.